Plangqrxph co



E. W. WHITAKER.

cLAMPlNG MEANS Fon MoLDlNG MACHINES.

APPLICATION FILED APR.9. |919.

Patented Sept. 16, 1919.

3 SHEETS-SHEET 1.

E. W. WHITAKER.

CLAMPING MEANS FOR MOLDING MACHINES.

APPLICATION FILED APR.9.1919.

1,316,259. Patentedsept. 16, 1919.

3 SHEETS-swim 2.

. no. Y :t rmx COLUMBIA PMNoakAPH C0., WASHlNuTaN, D. C.

E. W. WHITAKER.

CLAMPING MEANS FOR MOLDING MACHINES.

APPLICATION FILED APR. 9. |919.

Patented Sept. 16, 1919.

3 SHEETS-SHEET 3.

rus summum vLANouRAPIl' co., WASHINTun, u l."

UNTTED sTATEs PATENT ormon. 1

EDWARD W. WHITAKER, OF DAVENPORT, IOWA, ASSIGN'OR TO DAVENPORT MACHINE & FOUNDRY COMPANY, OF DAVENPORT, IOWA, A CORPORATION 0F IOWA.

CLAMPING MEANS FOR MOLDINCt-MACHINES.

Specification of Letters Patent. Patented Sept. 16, 1919.

Application led April 9, 1919. Serial No. 288,779.

To all whom t may concern:

Be it known that I, EDWARD W. WHIT- AKER, a citizen of the United States, and a resident of Davenport, in the county of Scott and State of Iowa, have invented certain new and useful Improvements in Clamping Means for Molding-Machines; and I do hereby declare that the following is a full, clear, and exact description thereof, reference being had to the accompanying drawings, and to the letters of reference marked thereon, which form a part of this specification.

This invention relates to mechanism for clamping a mold iiask to the movable arm of a molding machine of the roll-over type, firmly uniting the two during the roll-over operation, wherein the flask is conveyed from ,its initial position at one end of the machine to an inverted position at the other end of the machine.

The object of the invention is to produce a strong and eflicient clamping arm, readily adjustable to compensate for inequalities in the height of iiasks, and at the same time of simple construction, easily operated, and not liable to get out of order.

The invention consists in the matters illustrated and described and hereinafter pointed out in the appended claims.

In the drawings:

ligure 1 illustrates, in side elevation, a typical molding machine of the roll-over variety, to which my improved clamping mechanism is applied.

Fig. 2 is a plan view of the arm and of the part of the machinerto which it is attached.

Fig. 3 is a similar view showing a modl- 'ication of the clamping means.

' 4 is a side view of the arm end and of the modiied clamping means shown in Fig. 3.

Fi 5 is a lan view of the clamping arm and t e cylin er for actuating the arm.

Referring now more particularly to Figs. 1 and 2, the base A of the molding machine is provided at one end with a jolt Vunit J and at the other end with a pattern drawing unit D, and intermediate these units with an operating cylinder C, pivotally mounted at c to a standard or support S. The movable member or. roll-over arm B is pivotally mounted on the rock shaftb. The

table of the drawing unit D is suitably united to the piston of an operating cylinder E. The flask F has bottom and top boards f, f respectively, and is shown in its 1n1t1al position resting on the arm B. After the flask F has been lled with sand, and submittedto the familiar action of the jolt unlt J, the bottom board f is placed on the flask, a-clamping arm 4 swung over the bottom board and clamping parts applied whereby, the flask is securely locked: or clamped to the arm B. The latter may now be moved by the action of the cylinder C, and the arm B, and its load (iask F and contents), rolled over into the position shown 1n dotted lines inFig. 1. The table of the flask drawing unit D will then be brought into operative position, under the influence of the cylinder E, to receive the now inverted 1 iiask F, the clamping arm 4 released, and the iiask and the pattern separated, and the arm B with thetop or mold board f carrying the pattern, returned to the initial position, where a new flask will be used and the operation repeated. As the parts just described form no part ofmy present invention, no further description will be required, espe# cially as machines of this type and their operation are familiar to those skilledin the art.

pivot rod or shaft 3. The clamp arm 4 isbent and its short member 5 is vertically disposed and provided with a sleeve 6 adapted to engage the pivot rod or shaft 3 by means of the collar 7 apertured lugs 8 and 9 on the sleeve and collar respectively, and

the bolt 10. lThe outer endof the arm 4 is provided with clamping means comprising a clampplate 11 on the end of a screw 12 passing throughl the end 13'of the arm 4 said screw being operated bythe handle 14. A rod` 15 pivotally connected -at 16 to the arm B, is provided at its other endwith an rod l15, the latter passing throughv the fiange 17, thus forming telescopicv connection between the rods 15 and 19. Surrounding the thus putting the spring under tension.y

Vihen the clamping plate 11 is released, the normal thrust of the spring G will cause the rod 15 to move the arm 4 away from the flask F and to assume the position shown in full lines in Fig. 2.

It is immaterial, of course, whether or not in moving the arm 4 to the flask F,'the arm turns or swings on the pivot rod or shaft 3, oris fast to said rodor shaft and the latter turns or swings in its bearings 1 and 2.

Referring kto the modified clamping means illustrated, in Figs. 3, 4, it will be noted that in the end 13 of the arm 4 is secured downwardly projecting bolt 21 carrying on its y lower end aV clamping bar 22, which latter is provided with two laterally extending wedge shaped lugs or locking projections 23, 23, the under, inclined surfaces of which bear against the bottom board f of the flask F. By swinging the arm 4 over the flask F and moving the bar 22 toward the bottom board f, the wedges4 23 will contact with and may be pushed tightly against the bottom 'board f, thus firmly clamping the flask F and the` roll-over arm B together.

F ig.' 5 shows means for pulling the arm 4 over the flask, said means comprising a cylinder 2.5 connected with a source of fluid pressure supply, and operatively connected with the arm 4. Said cylinder 25 is provided.

with a piston 26 to which is connected one end of a rod 27, the other end of said rod 27 being pivotally connected at 28 to the arm 4. Fluid pressure to actuate the piston 26 may be obtained through the conduit 29 connected with any suitable source of fluid supply, not shown. If twolarms 4 are used, the other arm may be connected with the cylinvder 25 by a rod 27?.

It is obvious that the strain of clamping,

largely borne by the arm 4, is distributed to` ,the cam bearing and the roll-over element and hence the construction shown is very strong and not liable to easily break or to get out of order. My invention Ipossesses great practical utility, is simple in action, devoid of complicated parts and is very efficient in operation.

I claim as Vmy invention:

1. In a molding machine, :a roll-over element adapted to receive -a flask placed thereon, an arm pivotally mounted upon said element and adapted to have its free end swing in a. horizontal plane into a position above the flask and means for engaging the free end of said arm upon the flask to clamp the latter to the roll-over element.

2. In a molding machine, a roll-over element adapted to receive a flask placed thereon, an arni pivotally mounted upon said element and adapted to have its free end swing in a horizontal plane into a position above the flask and means for engaging the free end of said arm upon the flask to clamp the latter to the roll-over element, said means including a vertically operating element.

3. In a. mol-ding machine, a roll-over element adapted to receive al flask placed thereon, an arm `pivotally mounted upon said element and adapted to have its free end swing in a horizontal plane into a position above the flask kand means for engaging the free end of said arm upon the flask to clamp the latter to theroll-over element, said means including a movable 'flask contact element on said arm.

4. In a molding machine, a'roll-over element adapted to receive a flask placed thereon, an arm. mounted upon said element and adapted to have bodily, vertical movement relative thereto and also to have its free end adapted to swing in a horizontal plane into a position above the flask and means for clamping the flask between the roll-over element and said arm.

5. In a molding machine, a roll-over element adapted to receive a. flask placed thereon, an arm pivotally mounted on said element lout of line with the flask and adapted to have its free end swing in a horizontal plane to a `position above the flask, means for vertically moving said armkbodily toward the flask to clamp the latter to said roll-over element and means for maintaining the parts in clamped relation.

6. In a molding machine, a roll-over element adapted to receive a. flask thereon, a pair of guide-shaft bearing lugs on the side of said element, a shaft mounted in said lugs, a flask clamping arm mounted upon said shaft adapted to have its free end swing into position above the flask and means for clamping the arm, the flask and the roll-over element together.

7. In a molding machine, a roll-over element adapted to receive a flask thereon, a pair of lugs on said element, vertically arranged, alined apertures in said lugs, a 'shaft in said apertures, an armen said shaft, the free end of the arm being adapted to swing in a horizontal plane over the flask and means for clamping the flask and the arm to the roll-over element.

8. In a molding machine, a roll-over element adapted to receive a flask thereon, a clamping bar movably mounted on the side of said element, its free end being adapted to swing in a. horizontal clamping position over said flask, means to effect the Clamping of the arm and flask, and roll-over element together, said means including bearing elements mounted upon the under side of the free end of said ari and adapted to bear against the flask.

9. In a molding machine, a, roll-over element adapted to receive a flask thereon, an arm mounted at the side ot' the said element, means for moving said arm whereby its free end may swing in a horizontal plane over the flask position, means for clamping the ann in said last mentioned position and means for holding said .arm normally away from the clamping position.

In testimony that I claim the foregoing 15 as my invention I aflix my signature, in the presence of two Witnesses, this 5th day of April, A. D. 1919.

EDWARD W. WHITAKER. Witnesses:V

OTTO KINNEMANN, ARTHUR D. ZmBANT.

Copies of this patent may be obtained for ve cents each, by addressing thel Commissioner of Patents,

Washington, D. C. 

